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Mid-Infrared Single Photon Counting

Guilherme Temporao, Sebastien Tanzilli, Hugo Zbinden, Nicolas Gisin, Thierry Aellen, Marcella Giovannini, Jerome Faist

quant-pharXiv:quant-ph/0511254

Abstract

We report a procedure to detect mid-infrared single photons at 4.65 um via a two-stage scheme based on Sum Frequency Generation, using a Periodically Poled Lithium Niobate (PPLN) nonlinear crystal and a Silicon Avalanche Photodiode. An experimental investigation shows that, in addition to a high timing resolution, this technique yields a detection sensitivity of 1.24 pW with 63mW of net pump power.

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